My powder blue dwarf gouramI I think has a fungus. On and a little below his dorsal fin, there is a light grey coloration-it isn't too cottony and doesn't "stick out" too much but is discolored. I thought it was a fungus, but I don't know. Can anyone help me figure out what it is. Whatever it is, it spread to both of my female fancytail guppies and they both died. I put some Jungle fungus clear in and it hasn't gone away. Anyone know what it is and how I can treat it?